#main{
}
/*.hid{*/
/*    display:none;*/
/*}*/
body,#main{
    margin: 0;
    padding: 0;
    background-image: url("https://cdn.acwing.com/static/web/img/background.png");
    background-repeat: repeat;
}
.text {
    font-family: 楷体;
    font-weight: bolder;
    font-size: large;
}
.text:hover{
    color: red;
    text-decoration: none;
}
.content
{
    font-family: 楷体;
    font-weight: normal;
    font-size: smaller;
}
.all{
    background-color: white;
    padding-top: 3px;
    border-radius: 8px;
    margin-bottom: 5px;
    /*margin-left: 250px;*/
    /*margin-right:250px;*/
    /*box-sizing: border-box;*/
}
.hidden{
    display: inline-block;
    width: 100%;
    overflow: hidden;
    /*text-overflow:ellipsis;*/
}
.panel-body{
    padding: 10px;
    box-shadow: black 0px 0px 5px;
}
.panel-body:hover{
    background-color: whitesmoke;
}
.index-title{
    padding-bottom: 5px;
}
.header-title {
    font-size: 22px;
    font-weight: bold;
    color: #333;
    overflow: hidden;
    display: inline-block;
    /*margin-top: 15px;*/
}
.box3 img{width:40px; height:40px}
#back_top{
    display: block;
    cursor: pointer;
    position: fixed;
    right: 10px;
    bottom: 100px;
    display: none;
}
.carousel-inner img {
    width: 100%;
    height: 100%;
}